AdventOfCode-js-2019/12/Moon.js

const Vector3 = require("./Vector3");

module.exports = class Moon {
    /**
     * @param {Vector3} position The starting position of the moon
     */
    constructor(position) {
        /**
         * The position of the moon in space
         */
        this.position = position;
        /**
         * The position of the moon at the time of creation
         *
         * This is a silly trick to get a clean copy of the Vector, but it works.
         *
         * @private
         */
        this._initialPosition = position.negate().negate();
        /**
         * The current velocity of the moon
         */
        this.velocity = new Vector3(0, 0, 0);
    }
};